Ship-Bridge Collision Simulation and Performance Research of New Type Bridge Pier Protection Device

To reduce the significant losses caused by ship collisions on bridges, in this paper, a new combined anti-collision device set on a bridge pier is proposed., taking the 26# pier of Mingzhu Bay Bridge as the engineering background. To study the anti-collision performance of the anti-collision device, the failure mode, peak impact load, system energy conversion, and dynamic response of the ship and pier during the collision process of each working condition were compared and analyzed by finite element modeling. The results show that when the shipping speed is 5 m/s, compared with the unprotected condition; the new anti-ship collision device reduces the peak collision force by 35.13% and prolongs the collision time by 191%. The maximum deformation of the bow is reduced by 92.04%, and the maximum internal energy of the pier and the hull is reduced by 40.93% and 87.66%, respectively. The anti-collision device can significantly reduce the peak impact force and prolong the collision duration. It has good energy absorption ability, reduces the damage of ships and piers during impact, and effectively protects bridges and ships.